Influence of the amount of benchmark conditions working conditions Remarks Ambient temperature 23 ℃ ± 1 ℃ -10 ℃ ~ 40 ℃ ---- Ambient humidity 40% ~ 60% <80% ---- Instrument working voltage 9V ± 0.1V 9V ± 1.5V ---- Auxiliary grounding resistance value ＜100 Ω ＜30kΩ rC rP interference voltage no <20V ---- interference current no <2A ---- R measurement electrode spacing a>5da>5d ---- ρ measurement electrode spacing a>20ha>20h ----
General specifications function two, three, four-wire measurement of grounding resistance, soil resistivity; ground voltage, AC voltage measurement power DC 9V (zinc-manganese dry-cell batteries R14S 1.5V 6 Section , 300 hours of continuous standby) Range Ground resistance: 0.00Ω ~ 30.00kΩ Soil resistivity: 0.00Ωm ~ 9000kΩm Measuring method Precision 4-wire, 3-wire measurement, simple 2-wire measurement of ground resistance Measuring method Ground resistance: Rated current variable pole method, measuring current 20mA Max
Soil resistivity: quadrupole method (Wenner method)
Voltage to ground: average rectification (P(S)-ES interface between) test frequency 128Hz/111Hz/105Hz/94Hz (AFC) short-circuit test current AC 20mA max open-circuit test voltage AC 40V max test voltage waveform sinusoidal waveform electrode spacing range can be set up to 1m ~ 100m gear shift grounding resistance: 0.00Ω ~ 30.00kΩ Fully automatic gearshift soil resistivity: 0.00Ωm ~ 9000kΩm fully automatic gearshift backlight controllable blue screen backlight, suitable for use in dim places display mode 4-digit large LCD display, blue screen backlight measurement instructions measurement LED blinking, LCD countdown, progress bar graph indication LCD size 128mm × 75mm LCD display field 124mm × 67mm instrument size height, width and thickness: 215mm×190mm×95mm Standard test line 4: red 20m, black 20m, yellow 10m, green 10m each 1 simple test line 2: red 1.6m, black 1.6m each 1 auxiliary grounding rod 4: φ10mm×150mm Measuring time to ground voltage: about 3 times / second grounding resistance, soil resistivity: about 5 seconds / times the number of measurements 5000 times or more (short-circuit test, measure 1 time, stop for 30 seconds and then measure) line voltage AC 600V or less Measurement RS232 interface with RS232 interface, software monitoring, storage data can be uploaded to the computer, save and print Communication line RS232 communication line 1, 1.5m long data storage 300 groups, "MEM "MEM" storage indication, display "FULL" symbol indicates that the storage is full data hold hold data "HOLD" symbol indicates that the data to consult the data to consult the data "READ "The "OL" symbol indicates the interference test automatically recognizes the interference signal, and the "NOISE" symbol indicates the auxiliary grounding test when the interference voltage is higher than 5V. Resistance value test function, 0.00KΩ ~ 30kΩ (100R + rC & lt; 50kΩ, 100R + rP & lt; 50kΩ) Alarm function when the measured value exceeds the alarm value, "beep - beep - beep - beep -" Alarm Alert Battery Voltage When the battery voltage drops to about 7.5V, the battery voltage is low. Symbol display to remind the replacement of the battery power consumption standby: about 20mA (backlight off) power on backlight on: about 45mA (backlight off 25mA) Measurement: about 100mA (backlight off) Quality Total mass: 4.5kg (including packaging) Instrumentation: 1443g (including batteries) Test line: 1560g Auxiliary grounding rod: 935g (4) Working temperature and humidity -10 ℃ ~ 40 ℃; 80%rh or less Storage temperature and humidity -20℃～60℃; 70%rh or less Overload protection Measured grounding resistance: C(H)-E, P(S)-ES AC 280V/3 seconds between each port Insulation resistance 20MΩ or more (500V between circuit and enclosure) Voltage withstand AC 3700V/rms (between circuit and enclosure) Electromagnetic Characteristics IEC61326 (EMC) Suitable for Safety regulations IEC61010-1 (CAT Ⅲ 300V, CAT IV 150V, pollution degree 2);
IEC61010-031;
IEC61557-1 (grounding resistance);
IEC61557-5 (soil resistivity);
JJG 366-2004. basic error and performance indexes under the reference conditions. Under the basic error and performance indicators
Measurement function Measuring range precision resolving power grounding resistance
(R)0.00Ω～30.00Ω±2%rdg±3dgt0.01Ω30.0Ω～300.0Ω±2%rdg±3dgt0.1Ω300Ω～3000Ω±2%rdg±3dgt1Ω3.00kΩ～ 30.00kΩ±4%rdg±3dgt10Ω Soil Electricity
(ρ)
0.00Ωm～99.99Ωm depending on the measurement accuracy of R
(ρ=2πaR
a:1 m～100m;
π=3.14)0.01Ωm100.0Ωm～999.9Ω m0.1Ωm1000Ωm～99999Ωm1Ωm10.00kΩm～99.99kΩm10Ωm100.0kΩm～999.9kΩm100Ωm1000kΩm～9000kΩm1kΩmGrounding Voltage AC 0.0～600V±2%rdg±3dgt0.1VNote: 1. rC max or rP max when the Additional error ≤±3%rdg±5dgt.
(rC max: 4kΩ+100R＜50kΩ; rP max: 4kΩ+100R＜50kΩ)
2. Additional error ≤±5%rdg±5dgt at 5V disturbing voltage.